MS Access SUMIIF到SQL CASE語句

Question

我試圖將MS Access查詢轉換爲SQL，我很努力地找到正確的方法。

的MS訪問行是：記錄加載：薩姆（IIF（[cmp_CampaignTable]> [使用ContactID]> 0,1,0））

的SQL代碼我到目前爲止是：

SELECT  Project.ProjectName, 
       cmp_UKWarranty.ProjectID, 
       SUM(CONVERT(numeric,(CASE WHEN (cmp_UKWarranty.ContactID) >0,1,0) AS RecordsLoaded 
FROM   cmp_UKWarranty INNER JOIN 
         Project ON cmp_UKWarranty.ProjectID = Project.ProjectID INNER JOIN 
         Dial ON cmp_UKWarranty.DialID = Dial.DialID CROSS JOIN 
         CRC 

我沒有其他人問，有人能夠指出我在正確的方向嗎？

亞當

Answer 1

您的情況：

SELECT Project.ProjectName, 
     cmp_UKWarranty.ProjectID, 
     Sum(CASE 
      WHEN (cmp_UKWarranty.ContactID > 0) THEN 1 
      ELSE 0 
      END) 
FROM cmp_UKWarranty 
     INNER JOIN Project 
       ON cmp_UKWarranty.ProjectID = Project.ProjectID 
     INNER JOIN Dial 
       ON cmp_UKWarranty.DialID = Dial.DialID 
     CROSS JOIN CRC 

Answer 2

你幾乎在那裏。您需要then和else。此外，轉換爲「數字」是不必要的：當語法錯誤

SELECT p.ProjectName, w.ProjectID, 
     SUM(CASE WHEN w.ContactID > 0 THEN 1 ELSE 0) AS RecordsLoaded 
FROM cmp_UKWarranty w INNER JOIN 
    Project p 
    ON w.ProjectID = p.ProjectID INNER JOIN 
    Dial d 
    ON w.DialID = Dial.d CROSS JOIN 
    CRC